Today I started soldering, first the power supply. I was caught by surprise by an enamel coating on the wiring, but managed to remove it. Everything is in a very tight space, but I managed to solder everything; it was a real hassle. I measured continuity on several places and discovered I had no connection between 0V and 275V. I had cut and shrinkwrapped the 250V tap.
After disassembly, removal of the shrink wrap and probing some more resulting in getting weird readings, I noticed the 250V tap consisted of 2 wires. One is connected to the 0V tap, the other to the 275V tap.
I found the enamel coating a bit weird; that wasn't the case with my hammond transformers. And what about the 2-wire 250V tap. Is it normal that the user has to make this connection?
After disassembly, removal of the shrink wrap and probing some more resulting in getting weird readings, I noticed the 250V tap consisted of 2 wires. One is connected to the 0V tap, the other to the 275V tap.
I found the enamel coating a bit weird; that wasn't the case with my hammond transformers. And what about the 2-wire 250V tap. Is it normal that the user has to make this connection?
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The transformer should simply consist of wires as per diagram and colours.
I have never seen one where you have to scrape away enamel coating unless I have built one myself. They usually come with ends tinned.
If 2 of the wires were buried in the shrink wrap and shouldn't have been then I would be asking the seller for another transformer which is correct.
I dont have much confidence in this one.
I have never seen one where you have to scrape away enamel coating unless I have built one myself. They usually come with ends tinned.
If 2 of the wires were buried in the shrink wrap and shouldn't have been then I would be asking the seller for another transformer which is correct.
I dont have much confidence in this one.
There is nothing wrong with this transformer. The wires are cut by you not the manufacturer. Both wires ware available and could be used seperately even if wanted. Just connect them in case you like 275v instead of 250v.
All of the toroidal transformers that I've ordered have enameled secondary leads. They are also quite long, so that one can dress the cables to wherever you want them to be, and then clean off the enameling on the end, tin and solder to the connection point.
According to the documentation you have, the 250 V tap should already be contiguous with the 275 V one; I suspect that an F*** up was made in the factory. Let the manufacturer know about this, as there was obviously no quality check done before it was released for shipment.
According to the documentation you have, the 250 V tap should already be contiguous with the 275 V one; I suspect that an F*** up was made in the factory. Let the manufacturer know about this, as there was obviously no quality check done before it was released for shipment.
To try to sort out the confusion , your own words are --quote- "I CUT and shrinked wrapped the 250Volt connection " ----then--- " I discovered I had NO connection between the 275 Volts and zero ( 0) volts " .
Ergo- when you cut the 250 Volts connection you also cut the CONTINUITY of that section of the output transformer hence your comment -quote- "I found the 250 Volt tap consisted of two (2) wires "
Well the winding would if you cut into it .
Think auto transformer with various voltage tappings that rely on CONTINUITY--- sever the continuity and you get a disconnection.
Ergo- when you cut the 250 Volts connection you also cut the CONTINUITY of that section of the output transformer hence your comment -quote- "I found the 250 Volt tap consisted of two (2) wires "
Well the winding would if you cut into it .
Think auto transformer with various voltage tappings that rely on CONTINUITY--- sever the continuity and you get a disconnection.
Yes, I did what you (and thus I) stated. However, the leads were 20cm long. I cut down the 250V tap to 3cm and shrink-wrapped it. I did not cut into the windings.
I just don't know if I cut the CONTINUITY of that section as I did not measure that beforehand.
It could all be just by design and common knowledge, but I was cought by surprise. I think it's best if I just call the supplier and see what they have to say.
I just don't know if I cut the CONTINUITY of that section as I did not measure that beforehand.
It could all be just by design and common knowledge, but I was cought by surprise. I think it's best if I just call the supplier and see what they have to say.
Ooops,
You did cut the continuity, sorry.
Think of it like this, there is a 0 to 250 volt winding, then there is a 25 volt winding. They are joined together at the 250 volt tap, not inside the transformer, but at the two ends of the enamel wire inside the red sheath. Shortening the red wire cut the connection. Just solder the two ends of the wire in the red sheath and all will be well.
You did cut the continuity, sorry.
Think of it like this, there is a 0 to 250 volt winding, then there is a 25 volt winding. They are joined together at the 250 volt tap, not inside the transformer, but at the two ends of the enamel wire inside the red sheath. Shortening the red wire cut the connection. Just solder the two ends of the wire in the red sheath and all will be well.
That sounds like a plausible scenario, but as I didn't measure it before I can't say for sure.
So by shortening I removed the short and the solution is 'shorting' the two ends. Talk about confusion 😀
So by shortening I removed the short and the solution is 'shorting' the two ends. Talk about confusion 😀
It is actually quite the common practice to use the winding wires themselves for the leads and to make all the connections externally for the toroids, since there is no bobbin or core to protect the internal connections and the external ones can at least be easily restored.
As for leads dressing, some manufacturer do strip and tin them, and some don't bother as the user is most likely to cut the leads to the desired length anyway.
Some folks might say that you've offended the Goddess by cutting the leads of a transformer, and will incur her Wrath. *I* wouldn't say that (out loud) for fear of some of that Karma passing to me. But some folks might say it.
Just make sure you have a current Last Will and Testament and a Durable Power of Attorney in place. Don't panic, but don't procrastinate. But maybe it's nothing. Maybe.
YOS,
Chris
Just make sure you have a current Last Will and Testament and a Durable Power of Attorney in place. Don't panic, but don't procrastinate. But maybe it's nothing. Maybe.
YOS,
Chris
